You're spot on here. I've also been upvoting the non-spam comments on my posts to move the spammy ones to the bottom.
And I hate doing it but I do sometimes go look at the hidden comments on someone else's post just to see what it says, knowing full well it's spam. Urgh! Curiosity.
Curiosity killed the cat. Me too. Monkey see, monkey do. Hee hee.